2000 Ford F-150 wont restart

Tiny
ELLOBO
  • MEMBER
  • 2000 FORD F-150
  • 5.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 143,000 MILES
I have a2000 ford F150 with a 5.4 it stalls out and wont restart it acts like it is vapor locked after it sits for a time it will restart
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Friday, September 12th, 2014 AT 1:26 PM

5 Replies

Tiny
JDL
  • EXPERT
Does it stall at idle--highway speed or both? After it stalls does it crank ok? Have helper crank it, while visually check for spark at the spark plugs. I realize you have coil on plug ignition, so it's a pain. They do make tools that will react to bleed-through voltage, so you don't have to unplug anything. I have used a digital multimeter that would react to bleed-through voltage on plug wire, engine cranking or running. You didn't penetrate the plug wire or take it loose. It would show around 1/2 volt or a little more, I just looked for a zero reading, somewhere. I've never tried it on cop ignition.

If possible check your fuel pressure. Some Fords may not have a Schrader valve.

If it cranks good but won't start, I always to look for rpm signal, without that rpm signal, you aren't going anywhere.

Can you check for applicable trouble codes?
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Friday, September 12th, 2014 AT 3:23 PM
Tiny
ELLOBO
  • MEMBER
No it stalls when I go to stop. Then it wont crank it acts like it has back pressure then after it sits over night it will start and run fine
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Friday, September 12th, 2014 AT 3:51 PM
Tiny
JDL
  • EXPERT
Are you saying the starter motor won't crank, or it cranks good but won't start. If the latter, do the tests I've suggested.

With idle issues, I check for a leak of some kind, fuel--egr--vacuum, something of that nature. Also, check and clean idle air system.

Where applicable try tapping on your maf sensor, see if any engine reaction.
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Saturday, September 13th, 2014 AT 9:46 AM
Tiny
ELLOBO
  • MEMBER
I found the problem the ac co presser is locked up. And would not let the starter turn the motor over
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Saturday, September 13th, 2014 AT 9:55 AM
Tiny
JDL
  • EXPERT
Hey, good job.
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Saturday, September 13th, 2014 AT 10:31 AM

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